World Bulletin / News Desk 

At least 20 people were killed on Monday in series of blasts at several locations linked to Chad's police in the capital, N'Djamena, security sources told Reuters.

One international security source said seven people were killed in an initial suicide attack and another 35 people died when explosives planted at the police training school went off. A second source said at least 20 people had been killed but did not give a breakdown of the incidents.

The interior minister confirmed at least one suicide attack but gave no further details.

Interior Minister Abderahim Bireme Hamid said security forces had locked down the area but the situation was ongoing. He said it was too early to give any toll from the incident.

"I can confirm that it was a suicide attack," he told Reuters.

At least 10 people were killed and 60 others were wounded in two separate explosions on Monday at a police academy in N'Djamena, Chad, an eyewitness told Anadolu Agency.

The explosions occurred about five minutes apart around 10:00 am (0900 GMT), according to eyewitnesses.